The dead of MacBook Pro

Hi

Some days ago I bought used MacBook Pro 15.4" 2.2GHz Core i7 - Early 2011.

There was a problem with keyboard and trackpad, they just didn't work, but other things was working fine. The owner said, that he had a important information on his HDD and took it away. I thought, there will be nothing special and without any bad thoughts gave him money and went home.

At home I was surprised...

MacBook was completely dead!

-No any light from MagSafe (I checked it, and it seemed to be fine - there is an electricity)

-No lights on battery indicator

Tried all manipulations with battery

-Unplugged it

-Tried carousell with 10 sec holding button

-Tried to boot without battery

Also I tried some commands for booting.

I just don't know what to do!

Should I buy new SSD and do all this $@$* again or there an another problem

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